A microkelvin magnetic flux noise thermometer
Due to its non-driven nature, noise thermometry intrinsically is the method of choice when minimal heat input during the temperature measurement is required. Our noise thermometer, experimentally characterized for temperatures between 42 $${{\upmu }}$$μK and 0.8 K, is a magnetic Johnson noise thermo...
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| Main Authors: | , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
17 March 2014
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| In: |
Journal of low temperature physics
Year: 2014, Volume: 175, Issue: 5, Pages: 776-783 |
| ISSN: | 1573-7357 |
| DOI: | 10.1007/s10909-014-1146-0 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1007/s10909-014-1146-0
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| Author Notes: | D. Rothfuß, A. Reiser, A. Fleischmann, C. Enss |
| Summary: | Due to its non-driven nature, noise thermometry intrinsically is the method of choice when minimal heat input during the temperature measurement is required. Our noise thermometer, experimentally characterized for temperatures between 42 $${{\upmu }}$$μK and 0.8 K, is a magnetic Johnson noise thermometer. The noise source is a cold-worked high purity copper cylinder, 5 mm in diameter and 20 mm long. The magnetic flux fluctuations generated by the electrons’ Brownian motion is measured inductively by two dc-SQUID magnetometers simultaneously. Cross-correlation of the two channels leads to reduction of parasitic noise by more than one order of magnitude which allows for measuring the tiny noise powers at microkelvin temperatures. |
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| Item Description: | Gesehen am 24.08.2020 |
| Physical Description: | Online Resource |
| ISSN: | 1573-7357 |
| DOI: | 10.1007/s10909-014-1146-0 |